package day02;

import sun.reflect.generics.tree.Tree;

import java.util.TreeMap;
import java.util.TreeSet;

public class Demo03 {
    public static void main(String[] args) {
        TreeMap<Integer, String> tree = new TreeMap<>();
        tree.put(680, "A");
        tree.put(560, "A");
        tree.put(480, "A");
        tree.put(380, "A");
        tree.put(280, "A");

        //TreeSet
    }
}
